Aleksander-Kwaterczak, Urszula, and Aleksandra Rajca. “Urban Soil Contamination With Lead and Cadmium in the Playgrounds Located Near Busy Streets in Cracow (South Poland)”. Geology, Geophysics and Environment 41, no. 1 (August 5, 2015): 7. Accessed December 21, 2024. https://journals.agh.edu.pl/geol/article/view/1402.